The invention provides a message forwarding method and a message forwarding device. The method comprises the following steps: receiving a message to be forwarded by a network device, and acquiring a 5-tuple group; finding out whether a message forwarding session table matched with the 5-tuple group exists in the existing message forwarding session tables, if so, processing the message to be forwarded through a processing manner recorded in the matched message forwarding session table, and transmitting the processed message; if not, finding out whether a blacklist session table matched with the 5-tuple group exists in the existing blacklist session tables, if so, discarding the message to be forwarded, and if not, processing the message to be forwarded by the network device; if the message to be forwarded is processed and successfully transmitted, establishing the message forwarding session table of the 5-tuple group; recording the processing manner into the message forwarding session table; if the message to be forwarded is discarded by any one module in processing, establishing the blacklist session table of the 5-tuple group; and recording a discarding module and discarding reasons into the blacklist session table. With the adoption of the message forwarding method and the message forwarding device, CPU (central processing unit) consumption can be reduced, and the forwarding efficiency is improved.